NYPD bomb squad cops poured into a Manhattan neighborhood yesterday after a dog walker mistook stereo equipment in a car for an explosive device, police said.

The drama began around 8:22 a.m. after a passer-by spotted a box with loose wires and an LED clock display inside a red Mercury Minivan parked in front of the Japanese ambassador’s house on East 67 Street near Madison Avenue, cops said.

The bomb squad arrived at the scene and used a high-pressure water cannon to blow out three side windows and the back window of the van, then sent a robot in to investigate the “suspicious package.”